121011213213 has 48 divisors (see below), whose sum is σ = 198139748352. Its totient is φ = 70504020000.

The previous prime is 121011213209. The next prime is 121011213283. The reversal of 121011213213 is 312312110121.

It is not a de Polignac number, because 121011213213 - 2² = 121011213209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011213283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 332856 + ... + 593982.

It is an arithmetic number, because the mean of its divisors is an integer number (4127911424).

Almost surely, 2^121011213213 is an apocalyptic number.

It is an amenable number.

121011213213 is a deficient number, since it is larger than the sum of its proper divisors (77128535139).

121011213213 is a wasteful number, since it uses less digits than its factorization.

121011213213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261326 (or 261323 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 121011213213 its reverse (312312110121), we get a palindrome (433323323334).

The spelling of 121011213213 in words is "one hundred twenty-one billion, eleven million, two hundred thirteen thousand, two hundred thirteen".